Door-check.



0. L. BUTLEIL. I

noon GHEGK. APPLICATION FILED MAY 10, 1909.

Ptented Nov.30,1909.

' INI/EIVTOR UNITED STATES PATENT OFFICE.

COUR'ILAND L. BUTLER, or PITTSBURG, PENNSYLVANIA, AssIGNon T0 LORENZO o.I-IILLYARD, or DUBUQUE, IOWA.

DOOR-CHECK.

Specification of Letters Patent.

Patented Nov. 30, 1909.

To all whom it may concern:

Be it known that I, COURTLAND L. BUT- LER, a citizen of the UnitedStates, residing at Pittsburg, county of Allegheny, and State ofPennsylvania, have invented certain new and useful Improvements in Door-Checks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to door checks, especially to devices of thiskind which can be adjusted in order to lock the door in any of a numberof positions in which it is slightly open for ventilation or otherpurposes, the improved door check forming a safety device which willprevent the entrance of any unauthorized person into the room.

The main objects of the invention are to provide a construction ofsimple and convenient form embodying improved means for insuring theadjustment of the door in difierent positions; to furnish a simplelocking mechanism in which the same bolt is used at opposite ends tolock the door in fully closed position or any of its adjusted positions;and to provide for the positive arrest of the door when it has reached acertain position though permitting the safety device to be easily placedout of operation when such is desired.

With these ends in view the door frame has pivoted thereto alockinglever, which swings in lateral direction and is adapted to beplaced over a bolt on the door, said lever having an opening to receiveone end of the bolt when the parts are in the position indicated andthereby lock the door in completely closed position. By moving the bolton the door in the opposite direction it can be caused to engage withany of a number of openings with which the locking lever is provided,such lever being swung laterally to permit the opening of the door tothe desired extent and to cause the engagement of the bolt in thecorresponding opening or perforation. The locking lever is provided atits free end with outwardly extending lugs which are adapted to abutagainst stops or lugs located near the edge of the door and embracingthe locking lever, thus limiting the opening movement of the door, saidlever being reduced in thickness near its pivoted end in order to passfreely between the lugs carried by the door when the latter is in closedposition, whereby the locking lever may be swung into inoperativeposition.

In the accompanying drawing :Figure 1 is an elevation of a door checkconstructed in accordance with the invention, the door being shown aslocked in fully closed position. Fig. 2 is a horizontal section throughthe door and door frame and showing the parts in the position indicatedin Fig. l, and Fig. 3 is a view similar to Fig. 2, but showing the doorin one of its open positions- According to this invention a plate A issuitably secured to the door in horizontal alinement with a plate Bfixed to the door frame adjacent the free edge of the door.

.The plate A is provided with keepers a which serve to guide a bolt athat is limited in its movement with respect to the keepers by means oflugs (H, as indicated by the dotted lines in Fig. 1. The bolt a isoperated by a depending finger piece a formed on the bolt intermediateof the length of the latter. The plate B has pivoted to it by means ofan upright pin 79* a laterally swinging locking lever b, which, when thedoor is in fully closed position, is adapted to extend over the bolt a,said lever being provided at its free end with a lateral flangeperforated at b in order to receive one end of the locking bolt, asshown in Fig. 1, whereby the door is locked in closed position. Thefinger piece a of the bolt extends below the locking lever when theparts are in this position, so that by a lateral movement of the bolt,said lever may be released. In order to lock the door in a number ofopen positions the lever b is provided with a longitudinally extendingseries of openings or perforations 6 adapted to be engaged by the boltwhen the door is partially opened. The opening movement of the door,when the free end of the locking lever is released by the bolt, causessaid lever to be swung laterally into a position like that illustratedin Fig. 3, the locking lever being guided and held in close connectionwith the plate A by means of oppositely directed vertical lugs ta whichare formed integral with the plate A at the edge of the door and embracethe locking lever as shown in Fig. 3, said lugs confining the leverbetween them and the edge of the plate A.

When the door has been opened to the desired extent the bolt a is slidinto one of the perforations 5 whereby the door is locked in positionand cannot be opened from the outside, though providing for theventilation of the room. It will be noted that this locking of the dooris effected by the right hand end of the bolt a, with reference to Fig.1, whereas the locking of the door in fully closed position was eifectedby means of the left hand end of said bolt.

In order to limit the movement of the door and cause its arrest when theouter end of the swinging lever is reached, said lever is provided atits free end with vertically directed lugs Z2 which abut against thelugs a of the door plate. However, although said lugs a cause theguiding of the door with respect to the locking lever and also effectthe arrest of the door they do not prevent the locking lever from beingswung out of operation when it is not desired to use the safety device.To accomplish this end, the locking lever is provided near its pivotwith a portion b of reduced width which, when the door is fully closed,is opposite the lugs a so that the locking lever may be moved betweensaid lugs into inoperative position against the door frame.

It will be noted that the improved device is formed of comparatively fewparts, and that these parts may be readily manufac tured and assembled.The fact that a sliding bolt of ordinary construction can be used tolock the door in both closed and open position is also an importantfeature of the invention. The locking action of this bolt is verypositive and reliable and when the door is locked in one of its openpositions it is securely held against the entry of unauthorized persons,though providing for proper ventilation.

Without limiting myself to the precise construction shown, I claim 1.The combination of a swinging member on the door frame, and a bolt onthe door having both of its ends operative to lock said swinging member.

2. The combination of a laterally swinging member on the doorframe, anda sliding bolt on the door arranged to lock the swing ing member whenthe latter is placed over and alongside said bolt when the door isclosed and also when said member is swung laterally and the door opened.

3. The combination of a laterally swinging locking lever on the doorframe provided with a longitudinal series of perforations and an endperforation, and a horizontally sliding member on the door which looksthe latter in closed position by engaging in said end perforation andwhich looks the door in open position by engaging in any of the otherperforations.

4. The combination of a laterally swinging lever on the door framehaving a perforated lateral flange at its free end, and a sliding bolton the door which engages at one end in the perforation in said flangewhen said lever is placed over said bolt, the opposite end of the boltbeing operative to engage said lever at intermediate points and therebylock the door in open position.

5. The combination of a door and door frame, a laterally swinging deviceon one of said members, and a sliding device on the other memberoperative to engage and lock said swinging device with both ends and atdifferent points in the length of said device.

(3. The combination of a door plate fixed to the door and havingvertically disposed lugs directed toward each other adjacent the edge ofthe door, a swinging lever on the door frame embraced by said lugs andguided between them and said door plate, and a bolt on the door plate tolock the lever in position.

7 The combination of a swinging lever on the door frame, a plate fixedto the door and having lugs directed toward each other near the edge ofthe door, said lugs embracing said lever and forming a guide for thesame along the edge of the door, lugs or stops formed on the free end ofsaid lever to coact with said first named lugs in li1niting the movementof the door, and a device on'the door plate which engages and locks saidlever in a number of positions.

8. A door check comprising a sliding bolt adapted to be applied to thedoor, and a lever adapted to be applied to the door frame and having alongitudinal series of bolt receiving perforations and a perforatedendfiange to receive the end of said bolt when the door is closed.

9. A door check comprising a pivoted lever adapted to be applied to thedoor frame, a door plate having lugs to embrace and guide said lever,and a sliding bolt on the door plate operative to engage and lock saidlever at diiferent points in the length thereof.

10. A door check comprising a pivoted perforated lever adapted forapplication to the door frame, a door plate, means on the door plate toguide and arrest the 11lovement of said lever, and other means on thedoor plate operative to engage the perforations of the lever and therebylock said lever in a number of positions.

In testimony whereof I atlix my signature, in presence of two witnesses.

COURTLAND L. BUTLER.

lVitnesses J. B. IRWIN, WILLIAM F. Dm'rz, J 1'.

